So I just got an Nvidia Quadro FX 4600 PCIe card in the mail. Put it in, turned on my computer, and.....it emits a loud, high-pitched whine, and doesn't output a signal. The whine sounds digital, like a sine wave. That's really all I can say about the problem. Any ideas what's wrong? Thx.
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Usually an indicator that the 6-pin power connector isn't connected, or isn't providing enough power. Make sure you are using the proper power connector for the card.
Is the fan turning? Stop it with your finger and see if the whine stops.